Device for locking joints



(No Model.)

, E. ,L. GAYLORD.

DEVICE FOR LOGKING JOINTS. I No. 313-,l94.-' Patented Mar. 3, 1885.

EvZwarkZl. 70rd UNITED v STATES PATENT OFFICE.

EDWARD L. GAYLORD, OF BRIDGEPORT, CONNECTICUT.

DEVICE FOR LOCKING JOINTS.

SPECIFICATION forming part of Letters Patent No. 313,194, dated March 3, 1885.

Application filed September 3, 1884. (No model.)

To all whom it may concern:

Be it known that I, EDWARD L. GAYLORD, a citizen of the United States, residing at Bridgeport, in the county of Fairfield and State of Connecticut, have invented certain new and useful Improvements in Devices for Looking Joints; and I do hereby declare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to certain novel and useful improvements in devices for securing wooden joints, and has for its object to provide a device of simple construction, which, when used, will do away with the necessity of nailing or screwing together the portions of wood composing the joint; and with these ends in view my invention consists in the details of construction and method of adaptation hereinafter fully and in detail explained, and then specifically designated by the claims.

In order that those skilled in the art to which my invention appertains may more fully understand its construction. and operation, I will proceed to describe the same in detail, referring by letter to the accompanying drawings, forming a part of this specification, in which Figure 1 is a plan view of a joint secured by means of my improvement, and having the wood broken away; Fig. 2, a plan view of ajoint, showing the slot before the device is applied; Fig. 3, a sectional side elevation illustrating my improvement as applied to the portions forming the joint and forced below the surface of said portions. Fig. 4 is a sectional view on line 4 4, Fig. 1.

Similar letters denote like parts in the several figures of the drawings.

A are the portions of wood forming the joint, and having cut therein at their meeting faces the slot B, one-half the latter being formed in each portion.

D is the locking device, formed from cast metal, provided with a flange, C, extending around three sides thereof, and having at either end, and cast integral therewith,wedge-shaped projections E, set at right angles to the body of the device, and slanting outward from top to bottom.

F are ordinary dowels placed upon either side of the locking device, anddesigned to at ford additional security to the joint; but these may be done away with by the use of two of driven downward to about the center of the wood, as in that position it will securely hold both the front and rear meeting edges firmly in place.

The space, if any there be, which is left above the device may be closed in any desired manner, as by putty or a plug, 'th us making a neat finish to the joint.

Having thus described my invention.what I claim as new, and desire to secure by Letters Patent, is

1. In combination with the portions of wood forming a joint, and having cut therein slots, as described, the locking device having upon three. edges thereof a flange, and at either end thereof the outwardly-projecting wedgeshaped projections, substantially as hereinbefore set forth and specified.

2. In ajoint-lock, the body D, having flange C, and provided at either end with the wedgeshaped outwardly-slanting projections E, arranged as described, and for the purpose set forth.

In testimony whereof I aflix my signature in presence of two witnesses.

EDWARD L. GAYLORD.

Witnesses:

S. S. WILLIAMSON, W. I. HAVILAND. 

